Abstract
The 1:1 radical cation salts of new donor molecules, dimethylthio- (1) and ethylenedithio-(1,3-dithiolylidene)thioxotetrathiafulvalenes (2) with a magnetic FeCl4 or FeBr4 counteranion (1·FeBr4, 2·FeCl4 and 2·FeBr4) were prepared, and their electrical conducting and magnetic properties were investigated. The room-temperature electrical conductivities of 1·FeBr4 (compressed pellet), 2·FeCl4 (single crystal) and 2·FeBr4 (single crystal) were < 10-5, 1.8 × 10-4 and 7.0 × 10-2 S cm-1, respectively. The temperature dependence of paramagnetic susceptibility obeyed the Curie-Weiss law in all cases, and the Curie constant (C) and Weiss temperature (θ) were as follows: C=4.61 emu K mol-1 and θ=-5.4 K for 1·FeBr4; C=4.53 emu K mol-1 and θ=-13.4 K for 2·FeCl4; C=4.55 emu K mol-1 and θ=-31.2 K for 2·FeBr4. The remarkably different θ values between the three salts, considered together with their crystal structures, suggest significant interaction between Fe(III) spins by aid of π spins on 1 or 2 molecules.
| Original language | English |
|---|---|
| Pages (from-to) | 2089-2094 |
| Number of pages | 6 |
| Journal | Journal of Materials Chemistry |
| Volume | 11 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - Sep 26 2001 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Chemistry(all)
- Materials Chemistry
Cite this
Crystal structures and electrical conducting/magnetic properties in 1 : 1 FeCl4 and FeBr4 salts of dimethylthio- and ethylenedithio-(1,3-dithiolylidene)thioxotetrathiafulvalene radical cations. / Tsuyoshi, Kominami; Matsumoto, Takuya; Kazumasa, Ueda; Toyonari, Sugimoto; Keizo, Murata; Motoo, Shiro; Hideo, Fujita.
In: Journal of Materials Chemistry, Vol. 11, No. 9, 26.09.2001, p. 2089-2094.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Crystal structures and electrical conducting/magnetic properties in 1
T2 - 1 FeCl4 and FeBr4 salts of dimethylthio- and ethylenedithio-(1,3-dithiolylidene)thioxotetrathiafulvalene radical cations
AU - Tsuyoshi, Kominami
AU - Matsumoto, Takuya
AU - Kazumasa, Ueda
AU - Toyonari, Sugimoto
AU - Keizo, Murata
AU - Motoo, Shiro
AU - Hideo, Fujita
PY - 2001/9/26
Y1 - 2001/9/26
N2 - The 1:1 radical cation salts of new donor molecules, dimethylthio- (1) and ethylenedithio-(1,3-dithiolylidene)thioxotetrathiafulvalenes (2) with a magnetic FeCl4 or FeBr4 counteranion (1·FeBr4, 2·FeCl4 and 2·FeBr4) were prepared, and their electrical conducting and magnetic properties were investigated. The room-temperature electrical conductivities of 1·FeBr4 (compressed pellet), 2·FeCl4 (single crystal) and 2·FeBr4 (single crystal) were < 10-5, 1.8 × 10-4 and 7.0 × 10-2 S cm-1, respectively. The temperature dependence of paramagnetic susceptibility obeyed the Curie-Weiss law in all cases, and the Curie constant (C) and Weiss temperature (θ) were as follows: C=4.61 emu K mol-1 and θ=-5.4 K for 1·FeBr4; C=4.53 emu K mol-1 and θ=-13.4 K for 2·FeCl4; C=4.55 emu K mol-1 and θ=-31.2 K for 2·FeBr4. The remarkably different θ values between the three salts, considered together with their crystal structures, suggest significant interaction between Fe(III) spins by aid of π spins on 1 or 2 molecules.
AB - The 1:1 radical cation salts of new donor molecules, dimethylthio- (1) and ethylenedithio-(1,3-dithiolylidene)thioxotetrathiafulvalenes (2) with a magnetic FeCl4 or FeBr4 counteranion (1·FeBr4, 2·FeCl4 and 2·FeBr4) were prepared, and their electrical conducting and magnetic properties were investigated. The room-temperature electrical conductivities of 1·FeBr4 (compressed pellet), 2·FeCl4 (single crystal) and 2·FeBr4 (single crystal) were < 10-5, 1.8 × 10-4 and 7.0 × 10-2 S cm-1, respectively. The temperature dependence of paramagnetic susceptibility obeyed the Curie-Weiss law in all cases, and the Curie constant (C) and Weiss temperature (θ) were as follows: C=4.61 emu K mol-1 and θ=-5.4 K for 1·FeBr4; C=4.53 emu K mol-1 and θ=-13.4 K for 2·FeCl4; C=4.55 emu K mol-1 and θ=-31.2 K for 2·FeBr4. The remarkably different θ values between the three salts, considered together with their crystal structures, suggest significant interaction between Fe(III) spins by aid of π spins on 1 or 2 molecules.
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U2 - 10.1039/b101547h
DO - 10.1039/b101547h
M3 - Article
AN - SCOPUS:0034842920
VL - 11
SP - 2089
EP - 2094
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
IS - 9
ER -